特别要注意第二窗体对应的view的fxml文件路径写法（view和controller都放在各自的包下）： @FXML protected void show2Action() throws IOException { Stage stage = new Stage(); stage.setTitle("第二个窗体实验"); AnchorPane pane = FXMLLoader.load(getClass().getResource("../javafxcontroller2.fxml"));//要注意fxml文件的类路径写法(与本JavaFXController.java的相对关系） Scene scene = new Scene(pane,300,400); stage.setScene(scene); stage.initModality(Modality.APPLICATION_MODAL);//模式窗体 stage.setOnCloseRequest(new EventHandler<WindowEvent>() { @Override public void handle(WindowEvent event) { System.out.println("window close event"); if(i++<2){ event.consume(); // i=0; } else i=0; } }); stage.show(); // stage.showAndWait(); //等待stage关闭之后才能继续运行 System.out.println("stage.showAndWait"); // stage.show(); }